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Finding the Fourth Proportional to 710,627.67, 980,679.06 and 388,351.35

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Solution

The fourth proportional to 710,627.67, 980,679.06 and 388,351.35 is: 535,931.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,627.67 : 980,679.06 = 388,351.35 : x
  2. Step 2: Convert to fraction form
    710,627.67/980,679.06 = 388,351.35/x
  3. Step 3: Cross multiply
    710,627.67x = 980,679.06 × 388,351.35
  4. Step 4: Simplify right side
    710,627.67x = 380,848,036,867.73
  5. Step 5: Solve for x
    x = 380,848,036,867.73/710,627.67
  6. Step 6: Final answer
    x = 535,931.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.